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OBD-II Drive Cycle Procedures

  1. HEGO Monitor Procedure

    To activate HEGO monitor, ensure OBD-II DRIVE CYCLE VEHICLE PREPARATION  has been performed. Drive vehicle at 40 MPH for at least 5 minutes.

  2. EVAP Monitor Procedure

    To activate EVAP monitor when IAT PID is within 40-100°F (4-38°C), drive vehicle at 45-65 MPH for 10 minutes. Avoid sharp turns and hills. TP MODE PID should not exceed Part Throttle (PT), EVAPDC PID must be more than 75 percent, and FLI PID must be 15-85 percent.

  3. Catalyst Monitor Procedure

    To activate catalyst monitor, drive vehicle at cruise in stop and go traffic. This must be performed in a 10 minute period at 5 different road speeds between 25 and 45 MPH.

  4. EGR Monitor Procedure

    To activate EGR monitor, drive vehicle from a stop and accelerate to 45 MPH. Throttle position must be 1/2-3/4. Repeat this procedure 3 times.

  5. SEC AIR/Comprehensive Component Monitor Engine Procedure

    To activate ISC portion of Comprehensive Component Monitor (CCM), bring vehicle to a stop. Allow engine to idle with transmission in Drive (A/T) or Neutral (M/T) for 2 minutes.

  6. Comprehensive Component Monitor Transmission Procedure

    To activate transmission portion of Comprehensive Component Monitor (CCM) monitor on M/T models, accelerate from 0-50 MPH, and perform DRIVE CYCLE PROCEDURES  under ADDITIONAL SYSTEM FUNCTIONS. Ensure MISFIRE & FUEL MONITOR PROCEDURES are performed to verify repair. On A/T models, drive vehicle in Overdrive from a stop, and accelerate to 50 MPH. Drive vehicle at 50 MPH for at least 15 seconds. Bring vehicle to a stop. Cancel Overdrive. Accelerate vehicle from stop to 40 MPH. Maintain speed for at least 30 seconds. Activate Overdrive and accelerate to 50 MPH. Maintain 50 MPH for at least 15 seconds. Bring vehicle to a stop and wait at least 20 seconds. Repeat this procedure 5 times.

  7. Misfire & Fuel Monitor Procedures

    To activate misfire and fuel monitors, accelerate vehicle from a stop to 65 MPH. Without applying brake pedal, allow vehicle to decelerate with throttle closed to 40 MPH. Repeat this procedure 3 times.

  8. Readiness Check Monitor

    To perform readiness check, access On-Board System Readiness test mode on scan tool. See ON-BOARD SYSTEM READINESS (OSR) TEST MODE . Ensure that all non-continuous monitors have been completed. If all non-continuous monitors have not been completed, go to  PENDING CODE CHECK & EVAP MONITOR "BY-PASS" CHECK.

  9. Pending Code Check & EVAP Monitor "By-pass" Check

    This procedure is used to determine if a pending code is preventing DTC P1000 from being cleared. Using scan tool, check for pending codes. If DTCs are present, perform normal repair procedures for any pending code problem. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no DTCs are present, repeat any incomplete monitor procedure. If EVAP monitor is not complete and IAT is not within 40-100°F (4-38°C), or vehicle is above 8000 feet, perform  EVAP MONITOR "BY-PASS" PROCEDURE.

  10. EVAP Monitor "By-pass" Procedure

    Leave scan tool connected and allow vehicle to sit overnight. Vehicle must be parked for more than 8 hours. Perform steps  2 and  3 under OBD-II DRIVE CYCLE VEHICLE PREPARATION. DO NOT repeat step  1. Repeat  HEGO MONITOR through  READINESS CHECK MONITOR procedures.
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